| Acronym | Meaning |
| OBS | Observation/Observer - Obsolete - Obstacle -Off Balance Sheet - Optical Burst Switching (IEEE) - Organic Brain Syndrome - Organization(al) Breakdown Structure |
| MMOR | Master Of Management In Operations Research |
| NBC | National Broadcasting Corporation - Nuclear |
| FAS | Persian Language (ISO 639-2 Code) |
| QID | Quater In Die (Latin |
| F/U/B/O | For The Use And Benefit Of (found In Legal Documents) |
| POT | Plane Of Tranquility |
| XIX | Nineteen (in Roman Numerals) |
| MDP | Markov Decision Process |
| SIW | Simulation Interoperability Workshop |